"Images must have alt text" on element template icon

[barmac]

Describe the bug

Axe reports missing alt attribute on element template icon:

report

{
  "id": "image-alt",
  "impact": "critical",
  "tags": [
    "cat.text-alternatives",
    "wcag2a",
    "wcag111",
    "section508",
    "section508.22.a",
    "TTv5",
    "TT7.a",
    "TT7.b",
    "EN-301-549",
    "EN-9.1.1.1",
    "ACT"
  ],
  "description": "Ensures <img> elements have alternate text or a role of none or presentation",
  "help": "Images must have alternate text",
  "helpUrl": "https://dequeuniversity.com/rules/axe/4.9/image-alt?application=axeAPI",
  "nodes": [
    {
      "any": [
        {
          "id": "has-alt",
          "data": null,
          "relatedNodes": [],
          "impact": "critical",
          "message": "Element does not have an alt attribute"
        },
        {
          "id": "aria-label",
          "data": null,
          "relatedNodes": [],
          "impact": "critical",
          "message": "aria-label attribute does not exist or is empty"
        },
        {
          "id": "aria-labelledby",
          "data": null,
          "relatedNodes": [],
          "impact": "critical",
          "message": "aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty"
        },
        {
          "id": "non-empty-title",
          "data": {
            "messageKey": "noAttr"
          },
          "relatedNodes": [],
          "impact": "critical",
          "message": "Element has no title attribute"
        },
        {
          "id": "presentational-role",
          "data": null,
          "relatedNodes": [],
          "impact": "critical",
          "message": "Element's default semantics were not overridden with role=\"none\" or role=\"presentation\""
        }
      ],
      "all": [],
      "none": [],
      "impact": "critical",
      "html": "<img class=\"element-templates-list__item-icon\" src=\"data:image/svg+xml;base64,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\">",
      "target": [
        ".element-templates-list__item--selected > .element-templates-list__item-header > img"
      ],
      "failureSummary": "Fix any of the following:\n  Element does not have an alt attribute\n  aria-label attribute does not exist or is empty\n  aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty\n  Element has no title attribute\n  Element's default semantics were not overridden with role=\"none\" or role=\"presentation\""
    }
  ]
}

Steps to reproduce

1. Select a template with an icon
2. now this happens

Expected behavior

We should use empty alt="" as the icon is purely presentational.

Environment

• OS: [e.g. MacOS 10.2, Windows 10]
• Camunda Modeler Version: 5.30.0-rc.0 and previous
• Execution Platform: [e.g. Camunda 7, Camunda 8]
• Installed plug-ins: [...]

Additional context

No response